diff options
Diffstat (limited to 'llvm/lib')
| -rw-r--r-- | llvm/lib/Target/AArch64/AArch64FrameLowering.cpp | 30 |
1 files changed, 16 insertions, 14 deletions
diff --git a/llvm/lib/Target/AArch64/AArch64FrameLowering.cpp b/llvm/lib/Target/AArch64/AArch64FrameLowering.cpp index 4d44fbbcd1b..8737c8c3740 100644 --- a/llvm/lib/Target/AArch64/AArch64FrameLowering.cpp +++ b/llvm/lib/Target/AArch64/AArch64FrameLowering.cpp @@ -1733,20 +1733,22 @@ bool AArch64FrameLowering::spillCalleeSavedRegisters( BuildMI(MBB, MI, DL, TII.get(AArch64::SEH_Nop)) .setMIFlag(MachineInstr::FrameSetup); - // Emit a CFI instruction that causes 8 to be subtracted from the value of - // x18 when unwinding past this frame. - static const char CFIInst[] = { - dwarf::DW_CFA_val_expression, - 18, // register - 2, // length - static_cast<char>(unsigned(dwarf::DW_OP_breg18)), - static_cast<char>(-8) & 0x7f, // addend (sleb128) - }; - unsigned CFIIndex = - MF.addFrameInst(MCCFIInstruction::createEscape(nullptr, CFIInst)); - BuildMI(MBB, MI, DL, TII.get(AArch64::CFI_INSTRUCTION)) - .addCFIIndex(CFIIndex) - .setMIFlag(MachineInstr::FrameSetup); + if (!MF.getFunction().hasFnAttribute(Attribute::NoUnwind)) { + // Emit a CFI instruction that causes 8 to be subtracted from the value of + // x18 when unwinding past this frame. + static const char CFIInst[] = { + dwarf::DW_CFA_val_expression, + 18, // register + 2, // length + static_cast<char>(unsigned(dwarf::DW_OP_breg18)), + static_cast<char>(-8) & 0x7f, // addend (sleb128) + }; + unsigned CFIIndex = + MF.addFrameInst(MCCFIInstruction::createEscape(nullptr, CFIInst)); + BuildMI(MBB, MI, DL, TII.get(AArch64::CFI_INSTRUCTION)) + .addCFIIndex(CFIIndex) + .setMIFlag(MachineInstr::FrameSetup); + } // This instruction also makes x18 live-in to the entry block. MBB.addLiveIn(AArch64::X18); |
